thank you for your help, but its not exactly what i was looking for
. first of all, there is nothing wrong with intro image, it works perfrect. only the full article image is the problem. And i dont like your solution because it means, that i set exact size of the image and therefor the template is not responsive anymore.
in other words, when i change a size of the intro image in the template manager, i set the "maximum" size. when i shrink the page (to tablet size), the image and the whole layout (text, publish date, etc.) are working together, shrinking, resizing, going to the right side or under the image. i am looking for that functionality for the full article image. i dont want to set exact size in css. and as well, i dot want to have that empty shade on the right side of the image.
http://postimg.org/image/glxy8rnz9/ - this is bad because of hte empty shade, but its fully responsive
http://postimg.org/image/q57n28bhh/ - this is perfect and responsive, i just need it in full article view